Surname หัสวายุกุล (หัสวายุกุล 
, Hasvayukul, Hasavayukul 
) , in the world, is a very rare family name. The last name หัสวายุกุล is characteristic of Thailand, where it is a very rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| หัสวายุกุล | Thailand |
| Hasavayukul | United States, Thailand |